Articles

Our articles contain background information on valve technology, historical milestones and applications.
Last updated 24 December 2007

Links to All Classified Indexes Another way to locate all indexes

Additional Information Short Technical Features

Some Important British Valves Keith Thrower's selection of landmark developments

Manufacturers of Valves. Basic details of the main companies

1934 - Mullard 2 Volt Battery Valves From the Mullard 1934-35 Valve catalogue

1934 - Mullard AC Mains Valves From the Mullard 1934-35 Valve catalogue

1934 - Mullard Universal Valves (AC/DC) From the Mullard 1934-35 Valve catalogue

1934 - Frequency Changing From the Mullard 1934-35 Valve catalogue

An Acorn Valve Datasheet From a valve packed in 1936

A 1 kW Audio Amplifier.

Basic Introduction to the Valve From a beginners series in 1966

Basic Technical Aspects of Valves How a valve works

How To Build a Two Valve Set A practical project from cigarette cards in 1929

A Classic Unmasked The inside of an EL37 output pentode

The Dawn of Broadcasting in the UK The earliest history of Radio Broadcasting

Electron Multipliers An avalanche of electrons

EE50 Operation A secondary emission pentode explained.

The EM34 in Pictures A range of implementations for this tuning indicator

The Evolution of Our Photographs See how digital photography compares to film

The Famous EF50 Valve of WW2. How Television helped the seeing eye of RADAR

The First Airborne Radar. From a roomfull to a doorknob

The First All Valve Computer. The Colossus rebuild at Bletchley Park

The French 'R' Valve. The origins of the famous R Type

A Low Cost Valve Amplifier. A design from 1969 published in Practical Wireless

The Making of the EF80. Mullard produced a boxed set of components and a film

Marconi the Pioneer Brief account of the early spark gap experiments

Metal Striptease! We undress an American 6J5

The Metal Valve A contemporary account of the Catkin valve.

The New EL34 Audio Pentode. The original press release details

The Origin of the Valve. A few words from the inventor.

Osram Valves. The Early Days

The Osram Miniature Valve Story. An extract from an Osram data book.

The Pentode. A 1933 article by Stanley Mullard.

Pioneer. A short biography of Sir John Ambrose Fleming.

The Round Valves. A brief history of Captain Round's valves.

The Story of the Valve This makes a perfect introduction to the valve and its history

Travelling Wave Tube Amplifiers Theory and practice of these high gain microwave amplifiers

The History of the UK Valve An excellent book - a `must have'

Valves for Single Sideband Reducing ageing in balanced modulators

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